JP2001055864A - Window regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce weight by forming the width directional center of a cross section orthogonal to the lengthwise direction of a lift arm as a recessed part, and forming a hat-shaped cross section having flat collar parts continuing with side walls of the recessed part. SOLUTION: A lift arm 5 fixed to a driven gear 3 is molded as a step difference. That is, the width directional center of a cross section orthogonal to the lengthwise direction of the lift arm 5 is formed as a recessed part 51 to be formed as a hat-shaped cross section having flat collar parts 52, 53 continuing with side walls 51a, 51b of the recessed part 51. Even if a plate thickness of the lift arm 5 is thin, flexural rigidity and torsional rigidity can be increased by this hat-shaped cross-sectional part to reduce weight of a window regulator. In a hat-shaped cross section, a width and the depth of the recessed part 51 and a width of the flat collar parts 52, 53 can be easily changed to thereby obtain the lift arm 5 having proper flexural rigidity and large torsional rigidity to realize the window regulator having an excellent characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window regulator for raising and lowering a window glass of a vehicle door or the like, and more particularly, to a driven gear having a center of a tip circle as a rotation center and a base end portion fixed to the driven gear. A lift arm, a lift arm bracket attached to the window glass and formed with a guide extending in a direction intersecting the opening / closing direction of the window glass; The invention relates to a window regulator having a combined slider and rotating a driven gear by a motor or a human hand to rotate a lift arm to open and close a window glass.

[0002]

2. Description of the Related Art In a window regulator of this type, a distal end of a lift arm receives a load from a window glass in a direction perpendicular to a thickness direction. For this reason,
The lift arm is required to have a strength that does not cause buckling or excessive bending even when an external force within a predetermined range is received from a direction orthogonal to the thickness direction. In addition, since the window glass slightly moves in the thickness direction when ascending and descending, the lift arm is required to be capable of being appropriately elastically deformed in the thickness direction in conjunction with the movement of the window glass when ascending and descending.

[0003] As a cross-sectional shape perpendicular to the longitudinal direction of a conventional lift arm, there is a rectangular shape or a shape obtained by bending a rectangular side end into, for example, an L-shape.

[0004]

When the cross-sectional shape perpendicular to the longitudinal direction is a simple rectangular shape, it is necessary to set the bending rigidity in the thickness direction of the lift arm to an appropriate value and to increase the torsional rigidity with respect to the longitudinal axis. Must increase the thickness of the lift arm, not only can not save material,
There is a problem that the weight of the lift arm becomes heavy and the weight of the window regulator cannot be reduced.

On the other hand, in the case of a lift arm in which the side end of a rectangular cross section is bent, the bending rigidity and torsional rigidity are increased by bending, but when the amount of bending is increased, the thickness of the entire lift arm is greatly increased. There is a drawback, and it cannot meet the demand for increasing the torsional rigidity while keeping the flexural rigidity at an appropriate value.

The present invention has been made to solve the above problems, and an object of the present invention is to realize a window regulator which can be reduced in weight and has excellent characteristics.

[0007]

According to a first aspect of the present invention, there is provided a driven gear having a center of rotation of a tip circle, a lift arm having a base end portion fixed to the driven gear, A lift arm bracket attached to the windowpane and formed with a guide extending in a direction intersecting the opening and closing direction of the windowpane; and a stopper engaged with a tip of the lift arm and fitted to the guide of the lift arm bracket. Having a slider, rotating the driven gear to rotate the lift arm,
In the window regulator for opening and closing the window glass, as the lift arm, the center in the width direction of the cross section orthogonal to the longitudinal direction is a concave portion, and a hat-shaped cross section in which a flat brim portion continues to the side wall of the concave portion is formed. And at least an intermediate portion in the longitudinal direction is formed by step forming.

In the present invention, a lift arm having a hat-shaped cross section at least at an intermediate portion in the longitudinal direction is used. Therefore, even if the lift arm has a small thickness, it is bent at the hat-shaped cross section. The rigidity and torsional rigidity can be increased, and the weight of the window regulator can be reduced.

In addition, in the case of a hat-shaped cross section, the width and depth of the concave portion and the width of the flat brim portion can be easily changed, thereby having an appropriate bending rigidity and a large torsional rigidity. It is easy to obtain a lift arm, and a window regulator with excellent characteristics can be realized.

According to a second aspect of the present invention, the base end of the lift arm is arranged away from the center of the addendum circle so as not to overlap with the center of the addendum circle, and the base end portion has an end face provided with the base end. The peripheral wall is provided continuously so as to connect the side walls on both sides of the end portion.

The largest bending moment and the like act on the base end of the lift arm. However, if the peripheral wall is provided as described above, the strength of the base end can be increased, and as a result, the base of the lift arm can be increased. It is also possible to shorten the base end portion by disposing the end portion away from the center of the addendum circle, so that it is possible to save material and reduce the weight of the window regulator.

According to a third aspect of the present invention, a concave portion is formed deeply by providing a step portion at a position where the lift arm is fixed to the driven gear at a base end portion, and a concave portion is formed at a floor portion of the concave portion at the step portion. And a projection protruding in a direction opposite to the direction of the dent.

With this projection, the strength of the base end of the lift arm on which the largest bending moment or the like acts can be increased, and as a result, material saving and weight reduction of the window regulator can be achieved.

According to a fourth aspect of the present invention, the ratio of the width of the concave portion to the width of the flat brim portion is approximately 2: 1. With this ratio, to get the same bending stiffness,
The depth of the recess can be made the smallest, which leads to the achievement of a lightweight window regulator.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment relates to a single-arm window regulator used in a car. This embodiment will be described with reference to FIG. In FIG. 1, a base plate 1 is attached to a door panel (not shown).
The driven gear 3 is rotatably mounted with the pin 2. This pin 2 is located at the center of the addendum circle of the driven gear 3.

Since the present embodiment is a power type window regulator, a drive motor and a reduction gear box are also mounted on the base plate 1, and a rotary shaft 4 as its final output shaft is provided with a rotary shaft as shown in FIG. Although not shown, a pinion is provided, and the teeth 3a of the driven gear 3 mesh with this pinion. For this reason, when the rotating shaft 4 is driven clockwise in FIG. 1 by the motor, the driven gear 3 rotates counterclockwise, and when the rotating shaft 4 is driven counterclockwise, the driven gear 3 rotates clockwise. Will be.

The lift arm 5 is fixed to the driven gear 3 in the radial direction of the addendum circle, and FIGS. 2 to 5 show the detailed shape thereof. Here, FIG. 2 is a front view of the lift arm in FIG. 1, FIG. 3 is a cross-sectional view taken along line AA in FIG.
4 is a sectional view taken along line BB in FIG. 2, and FIG. 5 is a sectional view taken along line CC in FIG.

As is apparent from these figures, the lift arm 5 is formed in a stepped shape. The cross section orthogonal to the longitudinal direction has a recess 51 at the center in the width direction, and the side wall 5 of the recess 51 is formed.
It has a hat-shaped cross section in which flat flanges 52 and 53 are continuous with 1a and 51b. The width W1 of the concave portion 51 and the widths W2 and W3 of the flat flange portions 52 and 53 (W3 = W2).
Is selected to be approximately 2: 1.

The concave portion 51 at the base end portion 54 of the lift arm 5 is formed deep by providing a step portion 51g, and the floor portion of the concave portion 51 at this position is fixed to the driven gear 3. The base end portion 54 is fixed away from the center of the tooth tip circle of the driven gear 3 (as shown in FIG. 1) so as not to overlap with the center (center of the pin 2). In the present embodiment, the lift arm 5 is fixed to the driven gear 3 by welding. Therefore, as shown in FIGS. 2 and 3, the lift arm 5 is provided with a projection 51e for welding.

The end face of the base end portion 54 is provided with the base end portion 54.
A peripheral wall 51c is continuously provided so as to connect the side walls 51a and 51b on both sides of the peripheral wall 51c. Further, the distal end 55 of the base end 54 of the lift arm 5 is located farther than the fixed position to the driven gear 3.
On the floor of the concave portion 51 (stepped portion 51g) at a position closer to the bottom, a convex portion 51d projecting in a direction opposite to the concave direction of the concave portion 51 is formed.

On the other hand, the outer periphery of the distal end portion 55 of the lift arm 5 is formed so that the flat brim portions 52 and 53 go around. In FIG. 1 again, the lift arm bracket 6 is attached to a lower part of a window glass (not shown), has a substantially C-shaped cross section, and has a slit-like shape extending in a direction intersecting the opening / closing direction M of the window glass. A guide 6a is formed. A slider 7 movable along a guide 6a is fitted to the lift arm bracket 6. The slider 7 is held by the pin 8 at the tip 55 of the lift arm 5.
Is rotatably locked at

Next, the operation of this embodiment will be described.
FIG. 1 shows a state in which the window glass is closed. For this reason,
The lift arm 5 is rotating clockwise until the window glass contacts the window frame. To lower the window glass from this state, the rotating shaft 4 may be driven clockwise in FIG. 1 by a motor, and the lift arm 5 may be rotated counterclockwise. As a result, the slider 7 descends while moving in the guide direction of the guide 6a, and lowers the lift arm bracket 6 in the M direction. Therefore, the window glass also descends. Thereafter, in order to raise the window glass, the rotating shaft 4 may be driven counterclockwise by a motor.

In this embodiment, since the lift arm 5 having a hat-shaped cross section is used, even if the lift arm 5 has a small thickness, bending rigidity and torsional rigidity are increased at the hat-shaped cross section. As a result, the weight of the window regulator can be reduced.

In the case of a hat-shaped cross section, the width and depth of the concave portion 51 and the widths of the flat brim portions 52 and 53 can be easily changed, so that an appropriate bending rigidity and a large torsional rigidity can be obtained. It is also easy to obtain a lift arm 5 with improved characteristics, and a window regulator with excellent characteristics can be realized.

Incidentally, when the depth of the concave portion 51 is the same, W
When 1: W2 = 2: 1, the bending stiffness in the thickness direction can be increased, and if the ratio departs from this ratio, the material approaches a flat plate, and the bending stiffness decreases. Therefore, in order to obtain a desired bending rigidity, the width W1 of the concave portion 51 and the flat flange portions 52, 5 are required.
Changing the depth of the concave portion 51 while keeping the ratio of the widths W2 and W3 (W3 = W2) of approximately 3 to 2: 1 is advantageous in saving material and reducing the weight of the window regulator. It will be preferable. When W1: W2 = 2: 1, the torsional rigidity is also high.

The largest bending moment or the like acts on the base end portion 54 of the lift arm 5, but if the peripheral wall 51c is provided as in this embodiment, the strength of the base end portion 54 is greatly increased. As a result, the base end 54 of the lift arm 5 can be disposed away from the center of the addendum circle to shorten the base end 54, thereby saving material and reducing the weight of the window regulator. Can be achieved.

Further, in the present embodiment, the concave portion 5 is formed in the base end portion 54.
Since the projection 51d projecting in the direction opposite to the direction of the depression 1 is formed, the rigidity at this portion is improved, and the strength of the base end portion 54 of the lift arm 5 can be further increased.

The hat-shaped cross section of the lift arm 5 does not have to be formed over the entire length of the lift arm 5, but it is necessary to form a hat-shaped cross section at least in the middle.

Although this embodiment relates to a single-arm window regulator, the present invention can be applied to an X-arm window regulator widely known as a window regulator. Here, the X-arm type window regulator is provided with an equalizer arm crossing the lift arm in an X-shape, and the front end of the lift arm and the front end of the equalizer arm support the front and rear of the window glass, and raise and lower the window glass. Is what you do. This X
When the present invention is applied to an arm type window regulator, a step is formed so that the lift arm has a hat-shaped cross section. In this case, the cross section of the equalizer arm may be formed in a hat-shaped cross section.

[0030]

As described above, according to the first aspect of the present invention, the lift arm having the hat-shaped cross section formed at least at the intermediate portion in the longitudinal direction is used. Even if the thickness is thin, the bending rigidity and the torsional rigidity can be increased at the hat-shaped cross section, and the weight of the window regulator can be reduced.

In the case of a hat-shaped cross section, the width and depth of the concave portion and the width of the flat brim portion can be easily changed, whereby a lift arm having an appropriate bending rigidity and a large torsional rigidity can be obtained. It is also easy to obtain, and a window regulator with excellent characteristics can be realized.

According to the second aspect of the present invention, the base end of the lift arm is arranged away from the center of the addendum circle so as not to overlap with the center of the addendum circle, and the base end is provided on the end face of the base end. Are connected to each other so as to connect the side walls on both sides. The largest bending moment or the like acts on the base end of the lift arm. However, if a peripheral wall is provided as in the present invention, the strength of the base end can be increased, and as a result, the base end of the lift arm can be increased. Can be arranged away from the center of the addendum circle to shorten the base end, thereby saving material and reducing the weight of the window regulator.

According to the third aspect of the present invention, the recess is formed deep by providing a step at the position where the lift arm is fixed to the driven gear at the base end, and the recess of the recess is formed on the floor of the recess at the step. Since the protrusion projecting in the direction opposite to the direction is formed, the strength of the base end of the lift arm where the largest bending moment or the like acts can be increased without increasing the thickness of the lift arm, and as a result, the material Savings and a lighter window regulator.

According to the fourth aspect of the present invention, since the ratio of the width of the concave portion to the width of the flat brim portion is approximately 2: 1, the depth of the concave portion can be made the smallest to obtain the same bending rigidity. Material saving and window regulator weight reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a front view of a lift arm in FIG. 1;

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view (enlarged) taken along line BB in FIG. 2;

FIG. 5 is an enlarged cross-sectional view taken along the line CC in FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 base plate 2 pin 3 driven gear 4 rotating shaft 5 lift arm 51 concave portion 51a, 51b side wall 51c peripheral wall 51d convex portion 51g step 52, 53 flange 54 base end 55 distal end 6 lift arm bracket 6a guide 7 slider

Claims (4)

[Claims] 1. A driven gear having a center of rotation of a tooth tip circle as a center of rotation, a lift arm having a base end portion fixed to the driven gear, and attached to a window glass and extended in a direction intersecting the opening and closing direction of the window glass. A lift arm bracket having a guide formed thereon, and a slider locked to the distal end of the lift arm and fitted to the guide of the lift arm bracket, and rotating the driven gear to lift the lift arm. In the window regulator for rotating and opening and closing the window glass, the lift arm has a hat-shaped cross section in which a center in a width direction of a cross section orthogonal to the longitudinal direction is a recess, and a flat brim portion is continuous with a side wall of the recess. Characterized in that at least an intermediate portion in the longitudinal direction is formed with a step. Regulator. 2. A base end of the lift arm is arranged away from the center of the addendum circle so as not to overlap with the center of the addendum circle, and an end face of the base end is provided on both sides of the base end. 2. A peripheral wall is continuously provided so as to connect the side walls of the main body.
The described window regulator. 3. A step is provided at a position where the lift arm is fixed to the driven gear at a base end of the lift arm, and the recess is formed deep, and a floor of the recess at the step is provided with the recess. The window regulator according to claim 1 or 2, wherein a projection protruding in a direction opposite to the direction of the recess is formed. 4. The ratio of the width of the concave portion to the width of the flat brim portion is approximately 2: 1.
Or the window regulator according to 3.